Examine source code of FPL Boost

{
  "manifest_version": 3,
  "name": "__MSG_extName__",
  "version": "1.5.0",
  "description": "__MSG_extDesc__",
  "default_locale": "en",
  "homepage_url": "https://fpl-boost.com",
  "permissions": [
    "activeTab",
    "storage",
    "tabs"
  ],
  "host_permissions": [
    "https://fantasy.premierleague.com/*"
  ],
  "content_scripts": [
    {
      "matches": [
        "https://fantasy.premierleague.com/*"
      ],
      "js": [
        "constants.js",
        "utils/dom-utils.js",
        "utils/player-utils.js",
        "utils/fixture-utils.js",
        "utils/player-history-utils.js",
        "utils/player-badges-utils.js",
        "utils/league-utils.js",
        "utils/fdr-utils.js",
        "content.js"
      ],
      "css": [
        "styles.css"
      ],
      "run_at": "document_idle"
    }
  ],
  "background": {
    "scripts": [
      "constants.js",
      "background.js"
    ]
  },
  "action": {
    "default_popup": "popup.html",
    "default_title": "FPL Boost"
  },
  "icons": {
    "16": "icons/icon16.png",
    "32": "icons/icon32.png",
    "48": "icons/icon48.png",
    "128": "icons/icon128.png"
  },
  "browser_specific_settings": {
    "gecko": {
      "id": "extension@fpl-boost.com",
      "strict_min_version": "140.0",
      "data_collection_permissions": {
        "required": [
          "none"
        ]
      }
    },
    "gecko_android": {
      "strict_min_version": "142.0"
    }
  }
}